Merge remote-tracking branch 'origin/v0.8'
WINDOWS: Fix perfctr crash on Windows XP and Windows Server 2003
The first line of the commit log should be 50 characters max but otherwise LGTM.
I don't think that Scott has commit bits yet, I will reword and land.
windows: fix perfctr crash on XP and 2003
Some performance counter related functions are not available on Windows
XP and Windows Server 2003, which caused node to call a NULL pointer.